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Web Utils

Web development utilities. URL parsers, HTTP header tools, user-agent analyzers, and browser feature detectors — all client-side.

Clear UX Checklist
Analyze HTML, CSS, and JavaScript for clear labels, intuitive navigation, user feedback, and consistent patterns.
Dark Mode Checker
Check HTML and CSS for dark mode compatibility including prefers-color-scheme, CSS variables, and color contrast.
Mobile vs Desktop
Free client-side mobile vs desktop usage tracker.
Headers
Inspect HTTP response headers for any URL. View server, caching, security, and content-type headers at a glance.
htpasswd
Generate Apache htpasswd entries for HTTP basic authentication. Supports bcrypt, MD5, and SHA-1 hash formats.
HTTP Codes
Look up any HTTP status code. Browse all codes by category with descriptions, use cases, and quick reference table.
Popular Pages
Track which pages and tools on your website are most popular. Client-side page view counter with rankings, trends, and an embeddable tracking snippet.
Robots.txt
Txt generator. Create and customize robots.txt files to control search engine crawler access to your website.
Search Queries
Free client-side search query tracker. Monitor which search engine queries bring visitors to each page or tool on your website.
Error Handling Checker
Analyze JavaScript and HTML for proper error handling patterns including try-catch blocks, promise rejections, and input validation.
Fast Load Time Checker
Analyze HTML for performance bottlenecks, render-blocking resources, and oversized assets with actionable recommendations.
Input Validation Checker
Analyze HTML forms and JavaScript for proper input validation including required fields, type constraints, and sanitization.
Responsive Checker
Test HTML against a comprehensive checklist covering viewport, breakpoints, touch targets, images, typography, and layout.
URL Parser
Break down URLs into protocol, host, port, path, query parameters, and fragment with encoding and decoding support.
User Agent Parser
Break down user agent strings into structured tokens, detect browser, OS, device, engine, and architecture.
WebSocket Tester
Connect to any WebSocket server, send and receive messages, monitor connection status, and debug in real time.

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